The battery has a voltage of 11.1 V and 4,400 mAh of capacity, offering about 210 minutes (three and a half hours) of average usage. Obviously, this time depends on several variables, such as CPU load, screen brightness, optical drive usage, etc.
Opening the bottom cover (you only need to remove two screws), you have access to the hard disk, wireless network card (on a mini PCI Express slot) and two memory sockets. So, memory upgrades or hard disk changes are simple and quick.
The hard disk drive that comes in our notebook is a 640 GB, 5,400 rpm, SATA-300 from Western Digital, model WD6400BPVT.